Segment Information - Expenses from exited business (Details) - Reconciling items - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Expenses from exited business included: | ||||
| Amortization of reinsurance loss | $ 19.2 | $ 21.0 | $ 39.5 | $ 47.9 |
| Other impacts of exited business | 27.6 | 28.0 | 57.1 | 127.4 |
| Total expenses from exited business | $ 46.8 | $ 49.0 | $ 96.6 | $ 175.3 |